scripts/dtc/livetree.c

   1 /*
   2  * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  18  *                                                                   USA
  19  */
  20
  21 #include "dtc.h"
  22
  23 /*
  24  * Tree building functions
  25  */
  26
  27 void add_label(struct label **labels, char *label)
  28 {
  29         struct label *new;
  30
  31         /* Make sure the label isn't already there */
  32         for_each_label_withdel(*labels, new)
  33                 if (streq(new->label, label)) {
  34                         new->deleted = 0;
  35                         return;
  36                 }
  37
  38         new = xmalloc(sizeof(*new));
  39         memset(new, 0, sizeof(*new));
  40         new->label = label;
  41         new->next = *labels;
  42         *labels = new;
  43 }
  44
  45 void delete_labels(struct label **labels)
  46 {
  47         struct label *label;
  48
  49         for_each_label(*labels, label)
  50                 label->deleted = 1;
  51 }
  52
  53 struct property *build_property(char *name, struct data val)
  54 {
  55         struct property *new = xmalloc(sizeof(*new));
  56
  57         memset(new, 0, sizeof(*new));
  58
  59         new->name = name;
  60         new->val = val;
  61
  62         return new;
  63 }
  64
  65 struct property *build_property_delete(char *name)
  66 {
  67         struct property *new = xmalloc(sizeof(*new));
  68
  69         memset(new, 0, sizeof(*new));
  70
  71         new->name = name;
  72         new->deleted = 1;
  73
  74         return new;
  75 }
  76
  77 struct property *chain_property(struct property *first, struct property *list)
  78 {
  79         assert(first->next == NULL);
  80
  81         first->next = list;
  82         return first;
  83 }
  84
  85 struct property *reverse_properties(struct property *first)
  86 {
  87         struct property *p = first;
  88         struct property *head = NULL;
  89         struct property *next;
  90
  91         while (p) {
  92                 next = p->next;
  93                 p->next = head;
  94                 head = p;
  95                 p = next;
  96         }
  97         return head;
  98 }
  99
 100 struct node *build_node(struct property *proplist, struct node *children)
 101 {
 102         struct node *new = xmalloc(sizeof(*new));
 103         struct node *child;
 104
 105         memset(new, 0, sizeof(*new));
 106
 107         new->proplist = reverse_properties(proplist);
 108         new->children = children;
 109
 110         for_each_child(new, child) {
 111                 child->parent = new;
 112         }
 113
 114         return new;
 115 }
 116
 117 struct node *build_node_delete(void)
 118 {
 119         struct node *new = xmalloc(sizeof(*new));
 120
 121         memset(new, 0, sizeof(*new));
 122
 123         new->deleted = 1;
 124
 125         return new;
 126 }
 127
 128 struct node *name_node(struct node *node, char *name)
 129 {
 130         assert(node->name == NULL);
 131
 132         node->name = name;
 133
 134         return node;
 135 }
 136
 137 struct node *merge_nodes(struct node *old_node, struct node *new_node)
 138 {
 139         struct property *new_prop, *old_prop;
 140         struct node *new_child, *old_child;
 141         struct label *l;
 142
 143         old_node->deleted = 0;
 144
 145         /* Add new node labels to old node */
 146         for_each_label_withdel(new_node->labels, l)
 147                 add_label(&old_node->labels, l->label);
 148
 149         /* Move properties from the new node to the old node.  If there
 150          * is a collision, replace the old value with the new */
 151         while (new_node->proplist) {
 152                 /* Pop the property off the list */
 153                 new_prop = new_node->proplist;
 154                 new_node->proplist = new_prop->next;
 155                 new_prop->next = NULL;
 156
 157                 if (new_prop->deleted) {
 158                         delete_property_by_name(old_node, new_prop->name);
 159                         free(new_prop);
 160                         continue;
 161                 }
 162
 163                 /* Look for a collision, set new value if there is */
 164                 for_each_property_withdel(old_node, old_prop) {
 165                         if (streq(old_prop->name, new_prop->name)) {
 166                                 /* Add new labels to old property */
 167                                 for_each_label_withdel(new_prop->labels, l)
 168                                         add_label(&old_prop->labels, l->label);
 169
 170                                 old_prop->val = new_prop->val;
 171                                 old_prop->deleted = 0;
 172                                 free(new_prop);
 173                                 new_prop = NULL;
 174                                 break;
 175                         }
 176                 }
 177
 178                 /* if no collision occurred, add property to the old node. */
 179                 if (new_prop)
 180                         add_property(old_node, new_prop);
 181         }
 182
 183         /* Move the override child nodes into the primary node.  If
 184          * there is a collision, then merge the nodes. */
 185         while (new_node->children) {
 186                 /* Pop the child node off the list */
 187                 new_child = new_node->children;
 188                 new_node->children = new_child->next_sibling;
 189                 new_child->parent = NULL;
 190                 new_child->next_sibling = NULL;
 191
 192                 if (new_child->deleted) {
 193                         delete_node_by_name(old_node, new_child->name);
 194                         free(new_child);
 195                         continue;
 196                 }
 197
 198                 /* Search for a collision.  Merge if there is */
 199                 for_each_child_withdel(old_node, old_child) {
 200                         if (streq(old_child->name, new_child->name)) {
 201                                 merge_nodes(old_child, new_child);
 202                                 new_child = NULL;
 203                                 break;
 204                         }
 205                 }
 206
 207                 /* if no collision occurred, add child to the old node. */
 208                 if (new_child)
 209                         add_child(old_node, new_child);
 210         }
 211
 212         /* The new node contents are now merged into the old node.  Free
 213          * the new node. */
 214         free(new_node);
 215
 216         return old_node;
 217 }
 218
 219 struct node *chain_node(struct node *first, struct node *list)
 220 {
 221         assert(first->next_sibling == NULL);
 222
 223         first->next_sibling = list;
 224         return first;
 225 }
 226
 227 void add_property(struct node *node, struct property *prop)
 228 {
 229         struct property **p;
 230
 231         prop->next = NULL;
 232
 233         p = &node->proplist;
 234         while (*p)
 235                 p = &((*p)->next);
 236
 237         *p = prop;
 238 }
 239
 240 void delete_property_by_name(struct node *node, char *name)
 241 {
 242         struct property *prop = node->proplist;
 243
 244         while (prop) {
 245                 if (streq(prop->name, name)) {
 246                         delete_property(prop);
 247                         return;
 248                 }
 249                 prop = prop->next;
 250         }
 251 }
 252
 253 void delete_property(struct property *prop)
 254 {
 255         prop->deleted = 1;
 256         delete_labels(&prop->labels);
 257 }
 258
 259 void add_child(struct node *parent, struct node *child)
 260 {
 261         struct node **p;
 262
 263         child->next_sibling = NULL;
 264         child->parent = parent;
 265
 266         p = &parent->children;
 267         while (*p)
 268                 p = &((*p)->next_sibling);
 269
 270         *p = child;
 271 }
 272
 273 void delete_node_by_name(struct node *parent, char *name)
 274 {
 275         struct node *node = parent->children;
 276
 277         while (node) {
 278                 if (streq(node->name, name)) {
 279                         delete_node(node);
 280                         return;
 281                 }
 282                 node = node->next_sibling;
 283         }
 284 }
 285
 286 void delete_node(struct node *node)
 287 {
 288         struct property *prop;
 289         struct node *child;
 290
 291         node->deleted = 1;
 292         for_each_child(node, child)
 293                 delete_node(child);
 294         for_each_property(node, prop)
 295                 delete_property(prop);
 296         delete_labels(&node->labels);
 297 }
 298
 299 void append_to_property(struct node *node,
 300                                     char *name, const void *data, int len)
 301 {
 302         struct data d;
 303         struct property *p;
 304
 305         p = get_property(node, name);
 306         if (p) {
 307                 d = data_append_data(p->val, data, len);
 308                 p->val = d;
 309         } else {
 310                 d = data_append_data(empty_data, data, len);
 311                 p = build_property(name, d);
 312                 add_property(node, p);
 313         }
 314 }
 315
 316 struct reserve_info *build_reserve_entry(uint64_t address, uint64_t size)
 317 {
 318         struct reserve_info *new = xmalloc(sizeof(*new));
 319
 320         memset(new, 0, sizeof(*new));
 321
 322         new->address = address;
 323         new->size = size;
 324
 325         return new;
 326 }
 327
 328 struct reserve_info *chain_reserve_entry(struct reserve_info *first,
 329                                         struct reserve_info *list)
 330 {
 331         assert(first->next == NULL);
 332
 333         first->next = list;
 334         return first;
 335 }
 336
 337 struct reserve_info *add_reserve_entry(struct reserve_info *list,
 338                                       struct reserve_info *new)
 339 {
 340         struct reserve_info *last;
 341
 342         new->next = NULL;
 343
 344         if (! list)
 345                 return new;
 346
 347         for (last = list; last->next; last = last->next)
 348                 ;
 349
 350         last->next = new;
 351
 352         return list;
 353 }
 354
 355 struct dt_info *build_dt_info(unsigned int dtsflags,
 356                               struct reserve_info *reservelist,
 357                               struct node *tree, uint32_t boot_cpuid_phys)
 358 {
 359         struct dt_info *dti;
 360
 361         dti = xmalloc(sizeof(*dti));
 362         dti->dtsflags = dtsflags;
 363         dti->reservelist = reservelist;
 364         dti->dt = tree;
 365         dti->boot_cpuid_phys = boot_cpuid_phys;
 366
 367         return dti;
 368 }
 369
 370 /*
 371  * Tree accessor functions
 372  */
 373
 374 const char *get_unitname(struct node *node)
 375 {
 376         if (node->name[node->basenamelen] == '\0')
 377                 return "";
 378         else
 379                 return node->name + node->basenamelen + 1;
 380 }
 381
 382 struct property *get_property(struct node *node, const char *propname)
 383 {
 384         struct property *prop;
 385
 386         for_each_property(node, prop)
 387                 if (streq(prop->name, propname))
 388                         return prop;
 389
 390         return NULL;
 391 }
 392
 393 cell_t propval_cell(struct property *prop)
 394 {
 395         assert(prop->val.len == sizeof(cell_t));
 396         return fdt32_to_cpu(*((fdt32_t *)prop->val.val));
 397 }
 398
 399 struct property *get_property_by_label(struct node *tree, const char *label,
 400                                        struct node **node)
 401 {
 402         struct property *prop;
 403         struct node *c;
 404
 405         *node = tree;
 406
 407         for_each_property(tree, prop) {
 408                 struct label *l;
 409
 410                 for_each_label(prop->labels, l)
 411                         if (streq(l->label, label))
 412                                 return prop;
 413         }
 414
 415         for_each_child(tree, c) {
 416                 prop = get_property_by_label(c, label, node);
 417                 if (prop)
 418                         return prop;
 419         }
 420
 421         *node = NULL;
 422         return NULL;
 423 }
 424
 425 struct marker *get_marker_label(struct node *tree, const char *label,
 426                                 struct node **node, struct property **prop)
 427 {
 428         struct marker *m;
 429         struct property *p;
 430         struct node *c;
 431
 432         *node = tree;
 433
 434         for_each_property(tree, p) {
 435                 *prop = p;
 436                 m = p->val.markers;
 437                 for_each_marker_of_type(m, LABEL)
 438                         if (streq(m->ref, label))
 439                                 return m;
 440         }
 441
 442         for_each_child(tree, c) {
 443                 m = get_marker_label(c, label, node, prop);
 444                 if (m)
 445                         return m;
 446         }
 447
 448         *prop = NULL;
 449         *node = NULL;
 450         return NULL;
 451 }
 452
 453 struct node *get_subnode(struct node *node, const char *nodename)
 454 {
 455         struct node *child;
 456
 457         for_each_child(node, child)
 458                 if (streq(child->name, nodename))
 459                         return child;
 460
 461         return NULL;
 462 }
 463
 464 struct node *get_node_by_path(struct node *tree, const char *path)
 465 {
 466         const char *p;
 467         struct node *child;
 468
 469         if (!path || ! (*path)) {
 470                 if (tree->deleted)
 471                         return NULL;
 472                 return tree;
 473         }
 474
 475         while (path[0] == '/')
 476                 path++;
 477
 478         p = strchr(path, '/');
 479
 480         for_each_child(tree, child) {
 481                 if (p && strneq(path, child->name, p-path))
 482                         return get_node_by_path(child, p+1);
 483                 else if (!p && streq(path, child->name))
 484                         return child;
 485         }
 486
 487         return NULL;
 488 }
 489
 490 struct node *get_node_by_label(struct node *tree, const char *label)
 491 {
 492         struct node *child, *node;
 493         struct label *l;
 494
 495         assert(label && (strlen(label) > 0));
 496
 497         for_each_label(tree->labels, l)
 498                 if (streq(l->label, label))
 499                         return tree;
 500
 501         for_each_child(tree, child) {
 502                 node = get_node_by_label(child, label);
 503                 if (node)
 504                         return node;
 505         }
 506
 507         return NULL;
 508 }
 509
 510 struct node *get_node_by_phandle(struct node *tree, cell_t phandle)
 511 {
 512         struct node *child, *node;
 513
 514         assert((phandle != 0) && (phandle != -1));
 515
 516         if (tree->phandle == phandle) {
 517                 if (tree->deleted)
 518                         return NULL;
 519                 return tree;
 520         }
 521
 522         for_each_child(tree, child) {
 523                 node = get_node_by_phandle(child, phandle);
 524                 if (node)
 525                         return node;
 526         }
 527
 528         return NULL;
 529 }
 530
 531 struct node *get_node_by_ref(struct node *tree, const char *ref)
 532 {
 533         if (streq(ref, "/"))
 534                 return tree;
 535         else if (ref[0] == '/')
 536                 return get_node_by_path(tree, ref);
 537         else
 538                 return get_node_by_label(tree, ref);
 539 }
 540
 541 cell_t get_node_phandle(struct node *root, struct node *node)
 542 {
 543         static cell_t phandle = 1; /* FIXME: ick, static local */
 544
 545         if ((node->phandle != 0) && (node->phandle != -1))
 546                 return node->phandle;
 547
 548         while (get_node_by_phandle(root, phandle))
 549                 phandle++;
 550
 551         node->phandle = phandle;
 552
 553         if (!get_property(node, "linux,phandle")
 554             && (phandle_format & PHANDLE_LEGACY))
 555                 add_property(node,
 556                              build_property("linux,phandle",
 557                                             data_append_cell(empty_data, phandle)));
 558
 559         if (!get_property(node, "phandle")
 560             && (phandle_format & PHANDLE_EPAPR))
 561                 add_property(node,
 562                              build_property("phandle",
 563                                             data_append_cell(empty_data, phandle)));
 564
 565         /* If the node *does* have a phandle property, we must
 566          * be dealing with a self-referencing phandle, which will be
 567          * fixed up momentarily in the caller */
 568
 569         return node->phandle;
 570 }
 571
 572 uint32_t guess_boot_cpuid(struct node *tree)
 573 {
 574         struct node *cpus, *bootcpu;
 575         struct property *reg;
 576
 577         cpus = get_node_by_path(tree, "/cpus");
 578         if (!cpus)
 579                 return 0;
 580
 581
 582         bootcpu = cpus->children;
 583         if (!bootcpu)
 584                 return 0;
 585
 586         reg = get_property(bootcpu, "reg");
 587         if (!reg || (reg->val.len != sizeof(uint32_t)))
 588                 return 0;
 589
 590         /* FIXME: Sanity check node? */
 591
 592         return propval_cell(reg);
 593 }
 594
 595 static int cmp_reserve_info(const void *ax, const void *bx)
 596 {
 597         const struct reserve_info *a, *b;
 598
 599         a = *((const struct reserve_info * const *)ax);
 600         b = *((const struct reserve_info * const *)bx);
 601
 602         if (a->address < b->address)
 603                 return -1;
 604         else if (a->address > b->address)
 605                 return 1;
 606         else if (a->size < b->size)
 607                 return -1;
 608         else if (a->size > b->size)
 609                 return 1;
 610         else
 611                 return 0;
 612 }
 613
 614 static void sort_reserve_entries(struct dt_info *dti)
 615 {
 616         struct reserve_info *ri, **tbl;
 617         int n = 0, i = 0;
 618
 619         for (ri = dti->reservelist;
 620              ri;
 621              ri = ri->next)
 622                 n++;
 623
 624         if (n == 0)
 625                 return;
 626
 627         tbl = xmalloc(n * sizeof(*tbl));
 628
 629         for (ri = dti->reservelist;
 630              ri;
 631              ri = ri->next)
 632                 tbl[i++] = ri;
 633
 634         qsort(tbl, n, sizeof(*tbl), cmp_reserve_info);
 635
 636         dti->reservelist = tbl[0];
 637         for (i = 0; i < (n-1); i++)
 638                 tbl[i]->next = tbl[i+1];
 639         tbl[n-1]->next = NULL;
 640
 641         free(tbl);
 642 }
 643
 644 static int cmp_prop(const void *ax, const void *bx)
 645 {
 646         const struct property *a, *b;
 647
 648         a = *((const struct property * const *)ax);
 649         b = *((const struct property * const *)bx);
 650
 651         return strcmp(a->name, b->name);
 652 }
 653
 654 static void sort_properties(struct node *node)
 655 {
 656         int n = 0, i = 0;
 657         struct property *prop, **tbl;
 658
 659         for_each_property_withdel(node, prop)
 660                 n++;
 661
 662         if (n == 0)
 663                 return;
 664
 665         tbl = xmalloc(n * sizeof(*tbl));
 666
 667         for_each_property_withdel(node, prop)
 668                 tbl[i++] = prop;
 669
 670         qsort(tbl, n, sizeof(*tbl), cmp_prop);
 671
 672         node->proplist = tbl[0];
 673         for (i = 0; i < (n-1); i++)
 674                 tbl[i]->next = tbl[i+1];
 675         tbl[n-1]->next = NULL;
 676
 677         free(tbl);
 678 }
 679
 680 static int cmp_subnode(const void *ax, const void *bx)
 681 {
 682         const struct node *a, *b;
 683
 684         a = *((const struct node * const *)ax);
 685         b = *((const struct node * const *)bx);
 686
 687         return strcmp(a->name, b->name);
 688 }
 689
 690 static void sort_subnodes(struct node *node)
 691 {
 692         int n = 0, i = 0;
 693         struct node *subnode, **tbl;
 694
 695         for_each_child_withdel(node, subnode)
 696                 n++;
 697
 698         if (n == 0)
 699                 return;
 700
 701         tbl = xmalloc(n * sizeof(*tbl));
 702
 703         for_each_child_withdel(node, subnode)
 704                 tbl[i++] = subnode;
 705
 706         qsort(tbl, n, sizeof(*tbl), cmp_subnode);
 707
 708         node->children = tbl[0];
 709         for (i = 0; i < (n-1); i++)
 710                 tbl[i]->next_sibling = tbl[i+1];
 711         tbl[n-1]->next_sibling = NULL;
 712
 713         free(tbl);
 714 }
 715
 716 static void sort_node(struct node *node)
 717 {
 718         struct node *c;
 719
 720         sort_properties(node);
 721         sort_subnodes(node);
 722         for_each_child_withdel(node, c)
 723                 sort_node(c);
 724 }
 725
 726 void sort_tree(struct dt_info *dti)
 727 {
 728         sort_reserve_entries(dti);
 729         sort_node(dti->dt);
 730 }
 731
 732 /* utility helper to avoid code duplication */
 733 static struct node *build_and_name_child_node(struct node *parent, char *name)
 734 {
 735         struct node *node;
 736
 737         node = build_node(NULL, NULL);
 738         name_node(node, xstrdup(name));
 739         add_child(parent, node);
 740
 741         return node;
 742 }
 743
 744 static struct node *build_root_node(struct node *dt, char *name)
 745 {
 746         struct node *an;
 747
 748         an = get_subnode(dt, name);
 749         if (!an)
 750                 an = build_and_name_child_node(dt, name);
 751
 752         if (!an)
 753                 die("Could not build root node /%s\n", name);
 754
 755         return an;
 756 }
 757
 758 static bool any_label_tree(struct dt_info *dti, struct node *node)
 759 {
 760         struct node *c;
 761
 762         if (node->labels)
 763                 return true;
 764
 765         for_each_child(node, c)
 766                 if (any_label_tree(dti, c))
 767                         return true;
 768
 769         return false;
 770 }
 771
 772 static void generate_label_tree_internal(struct dt_info *dti,
 773                                          struct node *an, struct node *node,
 774                                          bool allocph)
 775 {
 776         struct node *dt = dti->dt;
 777         struct node *c;
 778         struct property *p;
 779         struct label *l;
 780
 781         /* if there are labels */
 782         if (node->labels) {
 783
 784                 /* now add the label in the node */
 785                 for_each_label(node->labels, l) {
 786
 787                         /* check whether the label already exists */
 788                         p = get_property(an, l->label);
 789                         if (p) {
 790                                 fprintf(stderr, "WARNING: label %s already"
 791                                         " exists in /%s", l->label,
 792                                         an->name);
 793                                 continue;
 794                         }
 795
 796                         /* insert it */
 797                         p = build_property(l->label,
 798                                 data_copy_mem(node->fullpath,
 799                                                 strlen(node->fullpath) + 1));
 800                         add_property(an, p);
 801                 }
 802
 803                 /* force allocation of a phandle for this node */
 804                 if (allocph)
 805                         (void)get_node_phandle(dt, node);
 806         }
 807
 808         for_each_child(node, c)
 809                 generate_label_tree_internal(dti, an, c, allocph);
 810 }
 811
 812 static bool any_fixup_tree(struct dt_info *dti, struct node *node)
 813 {
 814         struct node *c;
 815         struct property *prop;
 816         struct marker *m;
 817
 818         for_each_property(node, prop) {
 819                 m = prop->val.markers;
 820                 for_each_marker_of_type(m, REF_PHANDLE) {
 821                         if (!get_node_by_ref(dti->dt, m->ref))
 822                                 return true;
 823                 }
 824         }
 825
 826         for_each_child(node, c) {
 827                 if (any_fixup_tree(dti, c))
 828                         return true;
 829         }
 830
 831         return false;
 832 }
 833
 834 static void add_fixup_entry(struct dt_info *dti, struct node *fn,
 835                             struct node *node, struct property *prop,
 836                             struct marker *m)
 837 {
 838         char *entry;
 839
 840         /* m->ref can only be a REF_PHANDLE, but check anyway */
 841         assert(m->type == REF_PHANDLE);
 842
 843         /* there shouldn't be any ':' in the arguments */
 844         if (strchr(node->fullpath, ':') || strchr(prop->name, ':'))
 845                 die("arguments should not contain ':'\n");
 846
 847         xasprintf(&entry, "%s:%s:%u",
 848                         node->fullpath, prop->name, m->offset);
 849         append_to_property(fn, m->ref, entry, strlen(entry) + 1);
 850
 851         free(entry);
 852 }
 853
 854 static void generate_fixups_tree_internal(struct dt_info *dti,
 855                                           struct node *fn,
 856                                           struct node *node)
 857 {
 858         struct node *dt = dti->dt;
 859         struct node *c;
 860         struct property *prop;
 861         struct marker *m;
 862         struct node *refnode;
 863
 864         for_each_property(node, prop) {
 865                 m = prop->val.markers;
 866                 for_each_marker_of_type(m, REF_PHANDLE) {
 867                         refnode = get_node_by_ref(dt, m->ref);
 868                         if (!refnode)
 869                                 add_fixup_entry(dti, fn, node, prop, m);
 870                 }
 871         }
 872
 873         for_each_child(node, c)
 874                 generate_fixups_tree_internal(dti, fn, c);
 875 }
 876
 877 static bool any_local_fixup_tree(struct dt_info *dti, struct node *node)
 878 {
 879         struct node *c;
 880         struct property *prop;
 881         struct marker *m;
 882
 883         for_each_property(node, prop) {
 884                 m = prop->val.markers;
 885                 for_each_marker_of_type(m, REF_PHANDLE) {
 886                         if (get_node_by_ref(dti->dt, m->ref))
 887                                 return true;
 888                 }
 889         }
 890
 891         for_each_child(node, c) {
 892                 if (any_local_fixup_tree(dti, c))
 893                         return true;
 894         }
 895
 896         return false;
 897 }
 898
 899 static void add_local_fixup_entry(struct dt_info *dti,
 900                 struct node *lfn, struct node *node,
 901                 struct property *prop, struct marker *m,
 902                 struct node *refnode)
 903 {
 904         struct node *wn, *nwn;  /* local fixup node, walk node, new */
 905         fdt32_t value_32;
 906         char **compp;
 907         int i, depth;
 908
 909         /* walk back retreiving depth */
 910         depth = 0;
 911         for (wn = node; wn; wn = wn->parent)
 912                 depth++;
 913
 914         /* allocate name array */
 915         compp = xmalloc(sizeof(*compp) * depth);
 916
 917         /* store names in the array */
 918         for (wn = node, i = depth - 1; wn; wn = wn->parent, i--)
 919                 compp[i] = wn->name;
 920
 921         /* walk the path components creating nodes if they don't exist */
 922         for (wn = lfn, i = 1; i < depth; i++, wn = nwn) {
 923                 /* if no node exists, create it */
 924                 nwn = get_subnode(wn, compp[i]);
 925                 if (!nwn)
 926                         nwn = build_and_name_child_node(wn, compp[i]);
 927         }
 928
 929         free(compp);
 930
 931         value_32 = cpu_to_fdt32(m->offset);
 932         append_to_property(wn, prop->name, &value_32, sizeof(value_32));
 933 }
 934
 935 static void generate_local_fixups_tree_internal(struct dt_info *dti,
 936                                                 struct node *lfn,
 937                                                 struct node *node)
 938 {
 939         struct node *dt = dti->dt;
 940         struct node *c;
 941         struct property *prop;
 942         struct marker *m;
 943         struct node *refnode;
 944
 945         for_each_property(node, prop) {
 946                 m = prop->val.markers;
 947                 for_each_marker_of_type(m, REF_PHANDLE) {
 948                         refnode = get_node_by_ref(dt, m->ref);
 949                         if (refnode)
 950                                 add_local_fixup_entry(dti, lfn, node, prop, m, refnode);
 951                 }
 952         }
 953
 954         for_each_child(node, c)
 955                 generate_local_fixups_tree_internal(dti, lfn, c);
 956 }
 957
 958 void generate_label_tree(struct dt_info *dti, char *name, bool allocph)
 959 {
 960         if (!any_label_tree(dti, dti->dt))
 961                 return;
 962         generate_label_tree_internal(dti, build_root_node(dti->dt, name),
 963                                      dti->dt, allocph);
 964 }
 965
 966 void generate_fixups_tree(struct dt_info *dti, char *name)
 967 {
 968         if (!any_fixup_tree(dti, dti->dt))
 969                 return;
 970         generate_fixups_tree_internal(dti, build_root_node(dti->dt, name),
 971                                       dti->dt);
 972 }
 973
 974 void generate_local_fixups_tree(struct dt_info *dti, char *name)
 975 {
 976         if (!any_local_fixup_tree(dti, dti->dt))
 977                 return;
 978         generate_local_fixups_tree_internal(dti, build_root_node(dti->dt, name),
 979                                             dti->dt);
 980 }